Nut-lock.



No. imma. Patented luly l5, |902.

A. GRUMME.

NUT Lock.

(Application led July 1, 1901.) l

August Giumme PATENT OFFICE.

AUGUST GRUMME, O F

ST. LOUIS, MISSOURI.

'NUT-LOCK.

SPECIFICATION forming part of Letters Patent N o. 704,633, dated July15, 1902. Application filed 'July 1,1901. Serial No. 63,644. (No model.)

To @ZZ whom t may concern,.-

Beit known that I, AUGUST GRUMME, a citizen of the United States,residing at the city of St. Louis, in the State of Missouri, have in-Avented a certain new and useful Nut-Lock, of which the following is sucha full, clear, and exact description as will enable any one skilled inthe art to which it appertains to make and use the same, reference beinghad to the accompanying drawingsorming part of this specification.

The object of my invention is to simplify and improve the constructionof nut and bolt locks and to make their action more reliable.

My invention consists in part in the combination, with a sh-plateprovided with a rib, of an externally-threaded member, aninternally-threaded member, and a locking-plate provided with a recessfor receiving one of said threaded members to prevent its rotation, saidlocking-plate being adapted to be bent into locking engagement with saidrib. My invention alsorconsists in certain other novel features anddetails of construction, all of which are described in the followingspeciication and pointed out in the claims affixed hereto.

In the accompanying drawings, which illustrate a nut-lock made inaccordance with my invention, Figure 1 is an isometric projection oi' aportion oi" two rails with my nutlock applied thereto. Fig. 2 is across-section of the part shown in Fig. 1. Figs. 3 and 4 are a side andfront View, respectively, of the lockingplate; and Fig. 5 is a Viewsimilar to Fig. 2 but showing a slight modication.

Like marks of reference refer to similar parts in the several views ofthe drawings.

10 represents sections of the rails of an ordinary railway-track. Therails 10 rest on ties 11 in the usual manner. The ends of the rails 10are secured together by means o1' fishplates 12 and 13, which bearagainst the web 14 of the rails 10. Passing through the web la andsh-plates 12 and 13 are a number of bolts 15. The rounded heads 16 ofthe bolts 15 are provided with square portions 17, Fig. 2, which entersuitable recesses in the iishplate 12, and thus prevent the bolts 15from rotating. Each of the bolts 15 is provided with a nut 18. In orderto prevent the rotation of the nuts 18, I provide a locking-plate 19, inthe center of which is formed an opening 2O for the passage of one ofthe bolts 15. Around the opening 2O is a recess 21, adapted to receive aportion of one of the nuts 18. Each ofthe locking-plates 19 is providedwith two wings 22, preferably of less thickness than the body of theplate 19. These wings 22 are adapted to `be bent into locking contactwith the fish-plate 13. In order to accomplish this, it will usually benecessary to provide the said fish-plate 13 with a rib 23. around whichthe wings 22 may be bent. I prefer to make the outer portion of this rib23 slightly wider than its innerportion, so that the Wings 22 may securea firmer hold on theV said rib.

In Fig. 5 Ihave shownaslight modification, wherein the locking-plates 19are applied to the bolts 15 in place of the nuts 18. In thisconstruction the nuts 18 are placed in the re cesses of the sh-plates12, so as to prevent their rotation, and the bolts 15 are provided withsquare heads 24 in place of the rounded heads 16. These square heads 24fit in the recesses 21 of the locking-plates 19, so that when the wings22 are bent around the rib 23 the bolts 15 will be locked againstrotation.

In using my nut-lock the locking-plates 19 are in the form shown inFigs. 3 and 4. When the nut is to be applied to the bolt, thelocking-plates 19 are slipped over the bolts 15 and the nuts 18 screwedon said bolts. As soon as the nuts comeclose to the fish-plate 13 theywill enter the recesses 21in the locking-plates and the saidlocking-plates will turn with the nuts 18 until they are tight. TheWings 22 are then bent around the rib 23 and the nuts 18 thuseffectually prevented from rotating. In the modification shown in Fig. 5the operation is the same except that the locking-plates turn with thebolts 15 in place ot with the nuts. Y

I am aware that nut-locks have been heretofore constructed in which awasher provided with a pair of ribs extending into grooves on the innerface of the nut has been," bent so as to make locking contact with thefish-plate of a rail, and hence do not claim such con struction.

Having fully described my invention, what edge bent into engagement withthe face of said fish-plate.

2. In a nut-lock, the combination with a sh-plate, of a rib carried bysaid fish-plate and forming an acute angle with the face thereof, a boltpassing through an opening in said fish-plate, a nut for said bolt, alockingplate provided with a recess to receive said nut, and a Wingcarried by said locking-plate and adapted to have its face bent intoengagement with the edge of said rib and its edge bent into engagementwith the face of said fish-plate.

In testimony whereof I have hereunto set my hand and affixed my seal inthe presence of the two subscribing Witnesses AUGUST GRUMME.

Witnesses:

JAMES H. BRYsoN, JEssIE R. WATKINS.

